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AMD officially released the second generation of Xiaolong: 64 core 128 thread system IPC performance soared 23%

via:博客园     time:2019/8/8 10:01:40     readed:164

Author: Q above text

In 2017, the AMD Zen architecture was born. From Ruilong to Xiaolong, from the desktop to the notebook to the data center, a strong whirlwind broke, breaking the silence of the x86 processor industry for many years, especially the dragon led AMD. Returning to the data center market has opened up a new era.

Two years have passed, and the second generation of Xiaolong has finally arrived!

On August 7th, US local time, in the 100-year-old Palace Of Fine Arts, AMD CEO Dr. Su Zifeng personally released the new generation of Xiaolong 7002 series (codenamed Rome), setting a world record of 80. The strongest x86 processor in history.

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The second-generation Xiaolong uses the TSMC 7nm process in the same way as the desktop three-generation Ruilong. The official indicator is to double the transistor density, increase the frequency by 25% under the same power consumption, or halve the power consumption under the same performance.

Also consistent with the three generations of Ruilong, the second generation Xiaolong also used the new Zen 2 architecture.Single-threaded IPC (which can be understood as architectural performance or single-core performance) has an average increase of 15%, and IPC has an average increase of 23% under 32 core 64 threads.At the same time, it has added a large number of related functions such as server, data center, cloud, etc., and interconnection, memory, security, power supply, etc. have been strengthened accordingly.

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The second generation Xiaolong also uses the chiplet chiplet design, the base unit is still CCX, each CCX contains 4 cores (8 threads), then the two CCXs form a CCD, which is a CPU Die, which contains 8 cores (16 Threads), thenEach processor contains multiple CPU Dies and up to eight 64 cores (128 threads).

At the same time, there is still on each chip.A separate I/O Die is responsible for input and outputAnd integrated DDR4 memory controller, PCIe controller, connected to all CPU Die through the second generation Infinity Fabric bus, manufactured by GF 14nm process (I/O Die process on Ruilong 3rd generation is GF 12nm).

The most direct benefit of this approach is that it can reduce the design and manufacturing difficulty of large chips, save costs, and improve the yield. At the same time, it can be connected to all CPU cores independently after the generation of I/O parts is separated. Regardless of bandwidth or latency, it is easier to manage and call system and software.

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Memory continues to support eight-channel DDR4, types include RDIMM, LRDIMM, NVDIMM, 3DS, the highest frequency is 3200MHz (2666MHz for the first generation), and each core is still up to 64GB, but with a doubling of the number of cores, the maximum single-channel memory capacity has doubled. 4TB.

The second generation of Xiaolong is stillThe first server platform that supports PCIe 4.0, with up to 128 PCIe 4.0 buses per channel, divided into eight x16(Can continue to be subdivided into x8/x4/x2/x1), each with a bidirectional bandwidth of 64GB/s (up to 8 devices can be connected), so the total peak bandwidth per channel is 512GB/s, while fully supporting PCIe P2P, IOMMU. In a two-way system, each processor is divided into 64 interconnects, and the total is 128 PCIe 4.0.

Compared to the consumer desktop platform, PCIe 4.0 has a more significant impact on the data center, especially NVMe SSD storage performance and network performance.

The second generation of Snapdragon supports up to four parallels.The Infinity Fabric bus channel bandwidth between every two processors is 18GT/s, which is up to 68% higher than the 10.7GT/s of the first generation.

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Built-in independent security subsystem and AMD security processor, is a 32-bit microcontroller based on ARM A5 architecture, while the memory controller has built-in AES-128 encryption engine, the memory encryption key has increased from 15 generations to 509. At the same time, it continues to support SME Secure Memory Encryption, SEV Secure Encryption Virtualization, and adds support for Virtual Transparent Encryption.

Of course, the second generation of Snapdragon is backward compatible and the existing platform can be upgraded seamlessly.

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The second generation of Xiaolong has a total of 19 models, including 14 dual-channel models and 5 single-channel models. The two-way flagship model is Xiaolong 7742, 64-core 128-thread, 256MB L3 cache, and the reference frequency is 2.25GHz. 3.4GHz, the default thermal design power consumption is 225W, and the maximum can be opened to 240W, the price is 6950 US dollars.

In contrast, the first generation of the flagship Snapdragon 7601 is a 32-core 64-thread with a frequency of 2.2-3.2 GHz and a thermal design power consumption of 180 W.In the second generation, while the number of cores doubled, the acceleration frequency increased by up to 200MHz, and the thermal design power consumption increased by only 45W, or 25%.

Xiaolong 7702 is also a 64 coreThe frequency is 2.0-3.35GHz. The default thermal design power consumption is 200W, and the maximum is 200W, but the minimum can be reduced to 165W.

There are also48 core two, 32 core three, 24 core two, 16 core two, 12 core one, eight core two.

The single-way flagship model is the Xiaolong 7702P, which is completely the same as the Xiaolong 7702, but the price has been reduced from $6,450 to $4,425, as well as 32 cores, 24 cores, 16 cores and 8 cores.

In terms of frequency, the first generation of the Snapdragon benchmark is only 2.4GHz, the second generation is 2.0GHz, the highest can achieve 3.1GHz (although only 8 core), while the acceleration frequency generation is only 2.7-3.2GHz, the second generation comes to 3.2- 3.4GHz.

In terms of price, from the 32 core flagship Snapdragon 7601 to 64 core flagship Snapdragon 7742 will only increase by 65%, and to the same 32 core, higher specification Snapdragon 7502 (2600 US dollars), in fact, the price has dropped by almost 40%!

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According to the data given by AMD,霄龙7742 Compared to Xeon Platinum 8280L (28 cores), SPECrate2017 has 97% higher integer performance, 88% higher floating point performance, and 84% higher SPECjob2015 virtual machine performance. Performance is 80-100% ahead of the game, cost-effective by more than 1x, cost is reduced by 40-50%, and TCO is reduced by 25-50%.

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For data center products, in addition to their performance, the more important is ecosystem support. After two years of construction, the ecology of Xiaolong has flourished.The number of hardware and software platforms has more than doubled from the previous generation.AMD also erected a wall at the venue to list the names of the various partners.

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HPE announced on the scene that the new ProLiant DL325/385 and Apollo 35 based on the second generation of Opteron have been launched simultaneously, and the subsequent AMD products will be tripled. Meanwhile, HPE and AMD jointly announced 37 new world records.

Twitter data center infrastructure will be upgraded to the second generation of Xiaolong at the end of this yearThe number of CPU cores in a single cabinet increased by 40% from 1240 to 1792, but the power consumption remained the same, the heat dissipation did not need to be changed, and the TCO dropped to 25%.

Cray introduced a new generation of supercomputers built by AMD, the US Department of Energy, and Oak Ridge National Laboratory. "Frontier", based on the second-generation Opteron processor, will become one of the fastest supercomputers in the world.The US Air Force Weather Intelligence Agency will use the Cray Shasta Supercomputing System and the second generation of Snapdragon to provide the US Air Force and the Army with comprehensive terrestrial and space weather information.

Other major cooperation:

GoogleThe second generation of Snapdragon has been deployed in the internal infrastructure production data center environment, and the Google Cloud Computing Engine will also support the second generation Snapdragon at the end of this year.

MicrosoftThe new Azure virtual machine for universal applications is starting to offer previews today and is beginning to offer limited previews of cloud-based remote desktops and high-performance computing workloads, all based on the second-generation Snapdragon.

LenovoAnnounced a new solution that leverages all of the enhancements of the second-generation Opteron, and the simultaneous launch of the ThinkSystem SR655/SR635 is based on the second-generation Opteron.

DellA newly designed server optimized for the second generation of Snapdragon will be launched soon.

VMwarevSphere will support the security and other features of the second generation of Opteron.

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